<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
  <div id="app">
    <input type="text" v-model="msg">
    <p>{{msg}}</p>
  </div>

  <script>
    const { createApp, ref, reactive } = Vue
  
    createApp({
      setup() {
        const msg = ref('Hello vue!')
        const state = reactive({
          count: 0
        })

        console.log(state);
        
        return {
          msg
        }
      }
    }).mount('#app')
  </script>
  
</body>
</html>